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STATUS_TPM_OWNER_SET
Why an existing TPM owner changes the diagnosis
STATUS_TPM_OWNER_SET says that the TPM already has an owner in the TPM 1.2 ownership model. It should not be interpreted as evidence that a particular Windows user owns the device or that a normal account-password reset will affect the TPM state.
Owner terminology is historical and is especially important when supporting older TPM 1.2 applications. On current Windows, retrieve the reported TPM management state and determine which deployment or provisioning process owns the lifecycle. Replacing ownership or clearing the TPM can invalidate protected material and must be planned as a recovery operation, not a routine retry.
What to establish before changing state
- Confirm the TPM generation and whether a legacy owner operation is actually being requested.
- Capture TPM state and the dependency of BitLocker, Windows Hello, virtual smart cards or enterprise enrollment before changing ownership.
- Use the platform-approved PPI or management process when a state reset is truly required.
References
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